Finding the Third Proportional to 9,687 and 19,784

Step by Step Solution

1. Step 1: Write the proportion equation
   9,687 : 19,784 = 19,784 : x
2. Step 2: Convert to fraction form
   9,687/19,784 = 19,784/x
3. Step 3: Cross multiply
   9,687x = 19,784 × 19,784
4. Step 4: Simplify right side
   9,687x = 391,406,656
5. Step 5: Solve for x
   x = 391,406,656/9,687
6. Step 6: Final answer
   x = 40,405.35